If a picture is worth a thousand words...how much are 450,000 YouTube educational videos worth? Check out http://www.youtube.com/education for a little extra help understanding your course materials. And be sure to take a look at YouTube's Khan Academy if you're taking a math, physics or chemistry class. Khan Academy contains 3000+ videos--explaining everything from basic arithmetic to calculus and more--and is visited by a million students a month.
Use a library computer to hop on the Internet and watch one of the YouTube/Education videos. The library is here to help you succeed in college!